diff --git a/erpnext/hr/doctype/salary_slip/salary_slip.py b/erpnext/hr/doctype/salary_slip/salary_slip.py
index a4d6460..6840f25 100644
--- a/erpnext/hr/doctype/salary_slip/salary_slip.py
+++ b/erpnext/hr/doctype/salary_slip/salary_slip.py
@@ -76,7 +76,7 @@
 	def eval_condition_and_formula(self, d, data):
 		try:
 			if d.condition:
-				if not eval(d.condition, None, data):
+				if not eval(d.condition, {}, data):
 					return None
 			amount = d.amount
 			if d.amount_based_on_formula: